Tabulating mechanism for type-writers.



C. & W. J. SPIRO.

TABULATING MEGHANISM FOR TYPE WRITERS.

APPLICATION FILED JUNE 19, 1908. 953,560. Patented Mar. 29, 1910.

2 SHEETS-SHEET 1.

WZTNE [NVg/VTGKS 672127565 91m 9 I I I/Writer)? pzro. ,BY

G. & W. J. SPIRO.

TABULATING MECHANISM FOR TYPE WRITERS.

APPLICATION FILED JUNE 19. 1908.

Patented Ma11293 H??? I} 2 SHEETS-SHEET 2.

. [/VVENTORS dim/$552127 PI ,0;

\ 1 f I Y I! .1

CHARLES SPIRO- AND WALTER SPIRO, OF NEW YORK, N.

TABULA'IING MECHANISM roa'ryrnwmrnas.

' Specification of Letters Patent. Patented Mai.

Application'filed June 19,1908.' Serialiifio.=439,469. y

To all whom it may concern:

Be it known that we, CHARLES Srmo and WALTER -J. SPIRo, citizens of the United States, residing at New York, county of New York, and State of New Xor k, have invented certain new and useful Improve ments in Tabulating Mechanism for Type- Writers, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a tabulating mechanism for typewriters, andparticularly to a construction provided with a carriage stop and a cooperating jumper stop adapted to be thrown into the path of the carriage stop and to simultaneously release the car-- riage for movement.

The invention has for an object to provide a novel and improved construction of tabulatin-g mechanism whereby the jumper stop thereof is. adapted'to be moved into the path of the carriage stop through a key lever connection and to simultaneously release the controlling dog's for said carriage.

A further object of the invention is to provide a yielding mounting for the jumper stop whereby 'if it be thrown'into contact with the edge of the carriage stopthe tabulating operation is not hindered as the yielding connection permits movernen t of one of the parts upon another,"so tliat wh'emjl'iie controlling dogs are released the flexfi'carriage stop will abutthe jumper stop.

A? further object of the invention is to provide an improved form of adjustable carriage stop comprising opposite pivoted members having teeth adapted to engage choperating toothed faces of a tabulating rack disposed upon thecarri-age.

Another object of the invention is to pro vide novel and improved connections between the -key lever and the margin gage mechanism and from this mechanism ,to the line lock device whereby theeflici'ency of these parts is increased and aipositive operat1on thereof secured. Y

A-further object of the invention is to provide means by which the jumper stop may be longitudinally adjusted for aline= ment with the scales upon the machine.

Other and further objects andadvantage s of the invention will be hereinafter fully .tabulating mechanism.

The form of carriage partially IllHStPRtEde;

with a back space bar 19 operated from the fined bythe appended claims. a

In the drawing :Figure 1 is a plan of away; .Fig. 2 is a rear el-evation with parts broken away and the typewriter base in section; Fig. 3 is a central vertical section on line 33, Fig. 2; Fig. 4 is aperspective of: I

the margin gage and tabulating mechanisms; Fig. 5 is a similar View. of the dog ref leasing mechanism; Fig. 6 is a detail perspective of thejumper stop; Fig. 7 is an enlarge 'sectionof the mounting for the adj us-tme t) of this stop; Fig. 8 is a detail per spective of one "of the carriage stops; Fig.

9 is a similar View of the margin gage, and Fig. 10" is a plan of the line locking device;

Like numerals referz'tolike parts in the several views of the drawing.

The numeral 10 designates the frame of the machine which may be of any desired character or configuration and is provided withthe bearin tracks or ways 11 supported above the? base and u-pon'which the carriage frame 12 travels. This frame may be of any. pieferredconstruction. and i's adapted to carry the adjustable members for both the line lock and tabulating mechtheselmrh'egjhfipisms are disposed upon the base-as t'vel; as the key lever connectlons for operating the same. The base is also provided with any preferred form of controlling dog 13 for the carriage which is under tension in the usual manner. This dog is provided with the releasing lever 14,

Figs. 1 and 5, adapted to be engaged by the finger 15' extending from the pivoted bail 16 mounted on the frame of the dog mechanismby means of the pivots 17 at the opposite ends thereof. This bail is provided with the lip '18 adapted to be operated from the hereinisjspec'ifically described and claimed in'my application filed May 28, 1908, Serial No. 435,455 and is adapted to cooperate pivoted lever 20 and adapted to engage the holding stop 21 upon one of the ways-11. A

set forth andthenovel features thereof deas a typewriter carriage with parts broken; a

anisms, while'th e, cooperating members of engaged. with the carriage as disclosed in! ment with the block or stop 32. The wall said application. The carriage is also provided with a longitudinally extending releasing bar 24pivoted at its opposite ends 25 andnormally supported in-raised position by'spring 26 mounted upon the carriage frame. For the purpose of depressing this bar into contact With a finger 27. carried by the'bail 16to operate said bail and release the dog mechanism,- a lever 28 is pivoted at 29 upon the carriage frame and the end 30 rests upon and depresses the bar 24 when it is desired to release the dog mechanic-m from il'l' -rarriage. i Qhe general. -eonstruction and arrangement of the margin gagemechanism is disclosed in the? stem; to Charles Spiro No. 902,263 'dated' October 27, 1908, although improvements thereon are herein shown. The carriage 15 provided at its rear with a me; or toothed bar 3:1 extending 1ongitu(li 'nally thereof and adapted to cooperate with a contact-block 32 slidingly mounted upon the bar 33 upon the carriage and having a toothed lower end 34 to engage the rack 31 in contact with which it is heldunder normal conditions. by the spring 35 interposed between the fin er holds 36mm of which is pivotedat .37'1n'the slide member 38, as" shown in Fig. 9. This pivoted finger hold may also be provided-with a paper uide 39,

' and the block 32,, has thereon a bel ringing projection 40 adapted in itstravel to engage the lever 41 which is ivot'e'd at 42 upon the base and has at its pwer end an an ular projection43 disposed in the path 0 the projection 44 carried by the bell hammer 45 which when released strikes the bell '46 and the lever is. restored by spring 49. This hammer is normally held in contact with the bell by the spring 47 extending therefrom to a fixed post 48. By this means the contact blocks or stopsjfor the margin gage may be adjusted to any desired osition. The bell hammer herein describe is fully disclosed in Patent No. 902,263.

The margin stop mechanism comprises the primary stop 50 and the secondary stop 51 disposed when at rest in a lower horizontal said ears being-mounted uponthe bearing .contact face 56 forjjtlie rod 53 carried by the lugs 54 at the opposite ends of the plate 55. This late is also provided with a horizontally isposed v rimary stop and with-a similar facet? or the secondary stop 51, while an, abutment wall '58 is disosed at one end'oi the face56 and asiiniar wall 59 at th 57 both of these we s being out "of aline Top osite end of'the face their longitudinal movement with the carriage for the primary engagement of the contact therewith. The .stop plate is re stored to its normalposition after being released from the carriage by means of the coil'spring 60 disposed upon the rod 53 and bearing against one of the ears 52 mounted thereon and at its opposite end against the locking nut 61 mounted upon said rod, as shown in Figs. 4 and 7. Depending from the stop plate is a line lock finger ($2 disposed in substantially a vertical plane and adapted to engage the contact plate 63 carried at the upper end of the line lock (34 which is pivotally mounted in the machine frame and provided with an angle arm (35 side 0t its pivot, as shown inFig. 1. -A'

tiltin of the stop plate will release the stop .rom the block on the carriage and also.

carry the line lock finger out of engagement with its contact plate to permit the continued writing.

For thepurpose of effecting a tilting of the -margin gage stops which will also determine the paragraph insertion when desired by being moved to diiterentextents a lever 70 is pivoted upon the machine frame and provided at one end witha slotted portion 71 through which a projection 72 extends from the stop plate, while the opposite end 73 of the lever '70 rests upon an adjustable post 74 carried by the inner end 75 of a connection 76 from the key lever 77 which is pivoted in a fixed hanger 78. This connection comprises a loop portion 79 in order to dispose theend 75 thereofin'propen relation to the lever 70 while retaining the key lever at the extreme side of the he board. This key lever is normally held in its raised position by means of the spring 80 secured thereon and having an arm 81 in contact with a fixed portion of the frame. a

For the purpose of securing different deees of travel of the keylever 77 a margin ever 82 is pivotally mounted thereon at 83, as fully disclosed in Patent No. 902,263. By this arrangement a de ression of the paragraph key 77 causes t e greatest extent of movement and swing of the stop plate, while a depression of the margin key on the-lever "82 causes a. lesser travel to permit additional printing after the right margin gage-is first operated. '1

At the rear of the carriage a tabulating rack 85 is disposed and may be of any desired character, being here shown as pro 'vided at its top and bottom with oppositely disposed teeth 86gadapted to be engaged by the adjustable tabulating stops 87. This rack is removably mounted on the carriage by means of screws 119 at each end, and one end thereof is provided with a horizontal slide 120 to embrace the screw shank, while the opposite end is provided with a vertically disposed slide 121 so thatwhen these are secured to the carriage frame the rack is effectually held against any movement and may be removed without entirely removing the screws. These stops comprise clips formed of a. lower member 88 having an inclined toothed face 89 to fit the teeth of the rack, and a finger hold 90, and a pivoted upper member 91 having a corresponding toothed face 92 and a finger hold 93, these parts being pivoted together by a" pin 94, and the inclined faces normally forced toward each other by a tension spring 95 extending between the finger holds. This structure of clip stop rovides a simple device which may be readily set in any desired position for tabulating work and completely re-- moved from the machine when such work is not desired, while owing to the inclination of the teeth cooperating with the rack a positive firm stop is obtained.

The jumper stop 96 is preferably formed ofv U-shape with the pivoting ears 97 and 98 at opposite ends mounted upon the rod '53 which slidably supports the margin stops, or upon any other desired part. Intermediate 40. of the end of the jumper stop a contact face portion 103.

'09 is provided which when the stop is thrown inward toward the carriage travels into the nth of the member 88 of the clip stop which 1 forms an abutment to stop the carriage travel in tabulating work. The pivoting ear 98 is provided-with shoulders 100 upon its inner face which engage at opposite sides of the way 11 so as to limit the travel of this part. in opposite directions. At this end of the jumper stop the finger 101 is provided which engagesthetension arm of lever 102 pivotally mounted on the rod 53 and provided with an angularly disposed operating Upon the end ofthe rod 53 a coil tension spring 104: is mounted and one end thereof rests in the seat 105 above the contact face 103- and extended thence to the jumper stop being connected thereto at 106, as shown by dotted lines, Fig. 4. The tension of' this spring normally holds .this jumper stop in its position farthest removed from the carriage, and the applicationiof power for shifting this stop an the arm 102 effects a yielding connection between the stop and arm hrough the 'springin the inward movement of the stop While if the stop by contact with any part is'prevented from moving the arm travels so that as soon as the contact is removed the jumper stop im-' Inediately follows the arm in its travel toward the carriag Und r some condi tions it is desirable to adjust the jumper stop longitudinally of the oarriage travel for mounted at 111 upon the machine frame and provided-with a contact face 112 disposed beneath the angular extension 103 of the arm 102 so that in the upward movement of the face 112 the arm is swung toward the carriage. This lever 110 is also provided with a lower dog releasing'arm 113- extending inward to engage the lip 18 -from the bar mounted on thedog mechanism so as to secure a simultaneous release thereof as the jumper stop is thrown into contact with the tabulating stop upon the carriage. The opposite end of "the lever 110 is provided with a depending post 114 adjustably connected at 115 with the key lever 116 which is pivot:

' ally mounted in the usual manner upon the paragraph stops the contact blocks or steps upon the carriage are disposed at opposite sidesof the stop mechanism upon the machine frame so as to allow cooperation therewith at the opposite margins of the work. In the travel of the carriage from left to right in the ordinary step by step feed the block at the right of the stop mechanism first engages the bell ringer before reaching the end of the line and then by contact with the primary sto shifts the stop plate longitudinally upon t 'c' rod, while the line 'lock extension throws the arm into engagement with thebail. If it now be desired to add additional matter"to the line already written spaces for this purpose may be provided by depressing the paragraph key whichzoscillates the stop mechanism sufficiently to raise-the primary stopout of the path of the block and interposes the secthat side of the paper.

ondary stop therein thus allowing an additional number of spaces between these two stops. it be desired to entirely remove the stops the margin lever may be depressed and the writing extended into the margin at In the'return of the carriage to its initial position for beginning another line the block at the left thereof, Fig. 2, passes over the secondary stopand the inclined face thereon enga es the rimary stop forcing it backwar and alter the passage of the left block the primary stop returns to its initial position and contacts with the right block which establishes a uniform margin at that side of the paper: Under some conditions, such as paragraph.- ing, it is desirable to leave a greater space at this margin, and theparagraph key is then depressed which raises the secondary stop into-the path of the right contact block. The operation of the margin lever and para graph key provides means for oscillatingthe stop plate for different degrees of travel;

and this latecooperates with each of the contactb Oaks and controls the margins at both sides of the paper andalso th'e paragraphs and additional spaces at the left ends. The longitudinal travel of this plate by engagement with the stop positively operates the line lock, and the mounting of this lock causes it to be instantly released upon the return of the stop plate to its normal positionJThe tabulating mechanism coinprising the adjustable clips uponthe ear riage permits an adjustment ofthe'se' stops to any desired position andithei'r firm'engagement when so adjusted. The removable mounting for the tabulating rack permits its removal and replacement on the machine whenever desired. The operation of. the tabulating' lever simultaneously moves the jumper stop toward the-stop upon the can riage and releases the dog-mechanism so that the carriage can move into contact with the jumper stop, and as soon as pressure key lever and the lever in turn moves the jumper stop by means of the spring conparts a upon the tabulatin key is-released these tial posltion and the step by step feed proceeds. 'This jumper stop 1s moved through the yielding'connectionlwith the arm hear ing 1n contact therewith, and if the jumper should contact with the edge of the carriage,

stop when thrown toward the carriage and be thus held against further movement the arm would continue its movement and immediately the obstruction was passed the jumper stop travels into contact with-the arm in orderto cooperate with the next carriage stop. The lever is positively rocked through connections from V the tabulating immediate y restored to their ini operating dog, an v p posed to en age and release said dog simulnection, while this jumper step may also be adjusted longitudinally to be in" accurate alinement with the scales u on the machine. While this invention has n" described in connection with one fOrm or-type of typewriting machine, it-is adapted for application to various forms of machines by proper mechanical changes to locate the parts in cooperative relation.

Having described our invention and set forth itgmeritswhat-we claim and desire to secure by Letters Patent is 1. In a tabulating 'inechanism, a carriage stop, a jumper stop pivoted at each end at its lower portion and havin *a laterally disposed-contact lug interme iate its ends to engage said carriage-stop, and means for operatingsaid jumper sto 2. In a tabulating mec anism, a carriage stop, a pivotally mounted jumper stop having a portion to engage said carriage stop, an independently pivoted angular operating lever" having an arm to engage the jumper stop, an actuating lever adapted to en ago. an arm of the operating lever,- and a yiel 'n connection between the operating lever an umper stop.

3. In atabulating mechanism, a carria e stop, a bearing, a jumper stoppivotal y mounted thereon and having a ortion' to engage said carriage stop, a lever or operating said jumper stop, an actuating lever communicating with the 0 rating lever, and means for longitudinally adjusting the bearing and jumper stop thereon.- I

'4. In a tabulating mechanism, a carriage stop, a pivotally mounted jumper stop hav ing a portion to engage sajd carriage stop,

a lever for operating said jumperstop, an

actuating levercommunicatin with 'the operating lever, means for a justing the jumper stop longitudinally of its pivot, and a yielding connection between the-operating lever and jumper stop..

5. In a tabulatmg' mechanism, a carriage stop, a pivotally mounted jumper stop having a portion to engage .said carriage stop, a lever for operating. said jumper stop, an actuating lever communicating with the operating lever, an arm mounted upon the pivotof the jumper,stop,and a yieldmg connection between said arm and jumper stop.

7 6. In a tabulating. mechanism, a carriage stop, a'jumper stop. pivoted at its ends and having a lug intermediate its ends to engage said carriage stop, an actuating lever for an. extension from said lever ,dis-

taneous wit v the actuation of said-jumper stop.

7. In-"a tabulating mechanism, 125 rack provided: with a stop, a jumper stop said jumper stop, a carriage feed pivoted at its ends upon a relatively fixed part and provided .with a lateral 'GXtQDSlOll iiitern'iediate its ends to engage the carriage stop, a tension spring connected to said jumper stop and a relatively fixed part,- an

independently pivoted arm contacting with said jumper stop and held under tension by", said spring, and means for moving said jumper stop into the path of the stop upon the ca'riage rack.

8. ii a tabulatiii'g mechanism, acarriage ram-provided with a stop, a jumper stop pivoted upon a relatively fixed part and provided with a lateral extension to engage the carriage stop, a tension spring for normally I holding the jumper stop out of the path of .the carriage stop, means for moving the jumper stop into said path, and alever arm controlled by said spring and engag n the jumper stop and disposed in the path OFStIlCl operating means.

9,. In a tabulating mechanism, a carriage rack provided with a stop, a umper stop pivoted upon a relatively fixed part and provided with a lateral extension to engage'said carriage stop, a tension spring for normally holding the jumper stop out of the path of the carriage stop, means for moving the jumper stop into said path, a lever arm controlled by said spring andengaging the jumper stop and disposed in the path of said operating means, and means for adjusting said jumper stop longitudinally of its pivot.

1.0. In a tabulating mechanism, a carriage i stop, a jumper stop provided at opposite I eiids'with pivoting lugs-and an intermediate laterally disposed contact lug for said carriage stop, a tension spring adapted to hold the jumper stop out of the path of the car-.

riage stop, and means for throwing the umper stop into said path.

11. In a tabulating mechanism, a carriage sto a. jumper stop provided at opposite en s with p voting lugs and an intermediate laterally disposed contact lug for said carriage stop, a tensionspring adapted to hold t e jumper stop out of the path of the carriage stop, means for throwin the jumper stop into said path, an extension at one end of the jumper stop, and an arni.

mounted, upon the pivot of said jumper stop and provided with an angular portion disposed in the ath of the actuating means. 12. Int

a ta ulating mechanism, a carriage stop, a jpmperstop provided at opposite en s wit pivoting lugs and an intermediate laterally disposedcontact lug for said carriage stop, a tension spring adapted to hold the jumper stop out of the path .of the ca'rriageistop, means for throwing the jumper stop into saidpath, an extension at OIIE'BIid of the jumper stop, an arm mounted upon the pivot of said jumper stop and provided with an angular portion disposed in the path ofth'e actuating means, a su portinglug through which the pivot of t e jumper stop is threaded, and means for adjusting said ivot in said lug.

13. In a'taiiulating mechanism, a carriage stop, a jumper stop provided at opposite ends with pivoting lugs and an intermediate laterally disposed contact lug for said carriage stop, means for throwing said jumper stop into the path of the carriage stop, an extension at one end of the jumper stop, an arm mounted upon the pivot of said jumper stop and provided with an angular portion disposed in the path of the actuating means, a supporting lug through which the pivot of the jumper stop is threaded, an adjusting head disposed at one end of said pivot, and'a tension spring surrounding said head and engagin said tension arm.

14:. In a ta ulating mechanism, a carriage stop, a pivoted jumper stop having a contact lug for said carriage stop,'means for throwing said jumper stop into the path of said. carriage stop, a'pivoted arm mounted to 'engage said umper sto and rovided with an angular portion ispose in the path of the actuat ng means, a supporting lug through which the pivot of the um er stop is threaded, an adjusting head isposed at one end of sai pivot,.a tension spring surrounding said head and engagin said arm, and a lock nut threaded upon saic pivot to engage said threaded lug.

In a tabulatii g mechanism, a carriage stop, a pivoted jumper stop, a contact. lug for said carriage stop, actuating means for moving said jumper stopinto the-path of the carriage stop, a iivoted arm to engage said jumper sto an providedwith anan-' gular port-ion isposed in the path of the actuating means, and a sto portion carried by the jumper stop an provided with shoulders adapted to engage a relatively.

17. In a tabulating mechanism, supporting lugs, a pivoting rod mounted in saida lugs, a jumper stop having end portions an intermediate pivoted upon'sa-id r-od an contact face, and a tension sprin SUITOU iidment with saidstop.

18. In a tabulating mechanism,supporting lugs, a pivoting rod mounted in said ing said rodland having one en in engageends, an operating at its free end and an cooperatin tooth member and provided with a shoulder at its freemovement, an Operating lever having with said stop, ing said stop and having a portion contactof said stop."

lugs, a jumper, stop having end portions pivoted upon said rod. and an intermediate contact face, a tension spring surroundlng said rod and having one end 1n engagement and an angular arm engagmg With said tension spring.

.119. In a tabulating mechanism, a jumper stop pivoted at its ends andhaving a laterally disposed stop lug intermediate said lever for said jumper stop mounted upon a relatively fixed part, a key lever, alateral extension from said operating lever, a carriage controlling dog, and means engaging said do and extension for releasing said dog during the travel 20.. In a tabulating mechanism, a pivoted jumper stop, an operating lever therefor mounted upon a relatively fixed part, a key lever, a lateral ing lever, 21, carria e pivotally mounted having -an arm vdogmeehanism,

controlling dog, and a to engage and release sai anda projection in the path a 21. In a-tabulating mechanism, the combar havin oppositely faca CllP SiZOP comprismga tootlfed member having ashoulder operating handle, apivoted thereto end and an'operating handle, and a spring disposed to move said toothed members toward each other. a

22. In a tabulating'me'clia'nism, a carriage frame having holding screws, a toothed rack provided at one end with a longitudinally disposed open ended slot and at the opposite end with a transversely disposed open ended slot each adapted-to embrace the holding screws, and a stop mounted upon said rack toengage the teeth thereof.

In a. carriage controlling mechanism, a pivotally' mounted margin-gage havin a lateral extension and, adapted for sliding a slotted end engaging said extension, and a key lever disposed to engage said operating lever.

24. In a carriage controlling mechanism,

a pivotally mounted margin gage having \a lateral extension and adapted for sliding movement, an operating lever having a slotted end engaging said extension, a key lever disconnected from said operating lever and provided With a contact member disend of the operating lever.

25. In a carriage controlling mechanism, a pivotally mounted margin gage havin a lateral extension and adapted for sliding extension from said operat ail upon the dog casin 'movement, an operating lever having a ;'slotted .end engaging said extension, :1 key 5 lever disconnected from said operating lever and provided with a contact member dis- E posed beneath the free end of the operating lever, and means for ad usting the contact member upon the key lever.

26. In a carriage controlling mechanlsm, a supporting bracket, a pivoting rod mounted therein, a margin gage disposed upon I said rod for oscillatory and sliding movement thereon, and a jumper stop pivotally mounted upon said rod at opposite ends of the margin gage.

27. In a carriage controlling mechanism, a supporting bracket, a pivotin rod mounted therein, a margin gage isposed upon said rod for oscillatory and sliding movement thereon, a jumper stop pivotally mounted upon said rod at opposite ends-of the margin gage, and means for adjusting said rod and umper stop longitudinally of the margin and independently thereof.

28. In a carriage controlling mechanism, a toothed tabulating rack disposed at therear thereof, a series of adjustable carriage stops mounted. upon said rack stop having a contact tace to engage said carriage stops, a lever for said jumper stop pivoted upon the axis thereof, and a spring bearing upon the lever and jumper stop.

toothed tabulating rack disposed at the rear thereof, a'series of adjustable carriage stops mountedupon said rack, a pivoted jumper stop having a contact face to engage said carriage stops, an operating lever for said jumper stop, anangula-l' arm upon the pivot i of the jumper stop and adapted to engage I one end thereof and the operatmg lever, and a tension spring for connecting said arm and umper stop. 30. In a carriage controlling mechanism, a carriage provided with a holding rack, a I slide bar mounted *uponsaid' carriage, an ad justable holder upon said bar, angularly disposed slotted lugs at. each end of said holder I to embrace said bar, and a stop block pivot- I ally mounted in said lugs and provided with i teeth to engage said rack.

' 31. In a carriage controlling mechanism, a carriage provided with a holding stop, a slide bar mounted upon said carriage, an ad- 'ustable holder upon said bar, angu arly disposed slotted lugs at each end of said holder i to embrace said bar, a stop block pivotallv lmoun ted in said lugs and provided with teeth to engage said rack, and a holding spring disposed between an extension from said block and the adjustable holder.

32. In a carriage controlling mechanism, a holder for a stop block comprising a plate I having a finger piece at one end and lalera movable umper.

' a stop ted an provided wit gerl pieces.

ted and provided with a pivoting recess, and

block having a finger piece and pivots mounted in said'rec'esses.

33. In a carriage controlling mechanism, a

holder for a stop block comprising. a plate having a finger piece at one end and laterally dis osed lugs at opposite sides each slot- 7 a pivoting recess, astop block having a finger piece and pivots mounted in said recesses, a lower' toothed end extending laterally from said block and a holding spring disposed between said 34. In a carriage 'controllingmechanism;-a

v holder for a stop-bloclzcompi ising a-plate I having a finger piece at one end and'laterally disposed lugsat opposite sides each slot-'.

ted .and provided with a pivoting recess, a

stop block having a finger piece-and pivots.

mounted in said recesses, atoothed lower end upon said block provided at one side.

with an inclined face, and a spring disposed between said finger pieces.

In testimony whereof we 'afiix oursignaturesin presence of twowitnesses. CHARLES'SPIRO. .WALTER J. SPIBO..' Witnesses: i

E, J. Bmms'rocx, LEWIS Houses. 

